In 1949, the first stored-program computer
was built by engineer Maurice Wilkes, but it was 1960, after ICs came about, that Digital Equipment Corp.
In 1945 Turing drew up a design lot an electronic stored-program computer
, to be called the 'Automatic Computing Engine'.
Because on type-written paper a lower-case "x" could be read as "multiply" and "/" as "divide." As the typewriter went electric and became a terminal, two additions had to be made: "zero" and "one" could no longer be upper-case "O" and lower-case "1." Otherwise, data processing is still operating in the pre-computer age defined by this old keyboard (and by "computer" I mean the modern, stored-program computer
originally conceived by John von Neumann).
Like several other recent studies of data processing history, Pugh emphasizes the continuity between IBM's pre-war experience with the punched-card accounting machines bequeathed to it by Hollerith and its post-war activities with the electronic stored-program computer
. Here his firm grasp of technology serves him especially well.
The strength of this book is in its tracing the continuous chain of events from Leibniz's early attempt at a calculus of propositions all the way through to the stored-program computers
of our own time.
During the four decades since the development of the first stored-program computers
, there has been much evolution in processor architecture, in past as a response to the increasing complexity of the requirements.